FIELD: medical engineering. SUBSTANCE: this device incorporates light guide enclosed in polymer tube, laser end fitting, helical spring and collet whose nonworking end portion is connected to laser end fitting by thread portion. Light guide is securely positioned in through opening of collet. Helical spring is tightly fitted on light guide envelope and its one end is attached to collet external surface or securely positioned inside its opening. EFFECT: more sophisticated design. 7 dwg
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